JP2010099768A - Cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting device improving passing property of metal sheets and suppressing drop of productivity while securing the space required for removing cut crops. <P>SOLUTION: The cutting device 10 having an upper drum 13 and a lower drum 14 which are respectively arranged above and below a sheet passing route of metal sheets 6, 7 and on which cutting edges 11a, 11b, 12a, 12b are assembled and cutting the metal sheets 6, 7 by rotationally driving the upper drum 13 and the lower drum 14 includes: guide mechanisms 40, 50 arranged on the inlet side and outlet side of the threading route of the metal sheets 6, 7, including guide rollers 42, 52 for letting the metal sheets 6, 7 thread, and guiding the metal sheets 6, 7 in between the upper drum 13 and the lower drum 14; and moving mechanisms 60, 70 moving the guide mechanisms 40, 50 between a guide position where the metal sheets 6, 7 are guided in between the upper drum 13 and the lower drum 14 and a retracting position departing from the guide position. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cutting device.

  A cutting device (hereinafter referred to as CS before finishing) in which a metal plate (such as a slab) is roughly rolled by a roughing mill, and the front and rear ends of a metal plate are arranged in front of a finishing mill group consisting of a plurality of finishing rolling mills. And hot rolling equipment that performs a process of rolling to a desired sheet thickness (finish rolling) for each slab by a plurality of finish rolling mills.

  Moreover, in the hot rolling facility described above, a joining machine is installed between the rough rolling mill and the pre-finishing CS so that a plurality of metal plates can be connected to the rear end of the preceding metal plate and the following metal by this joining machine. There is also known a hot rolling facility that joins the front end of a plate and continuously performs finish rolling. In such a hot rolling facility, a cutting device (hereinafter referred to as CS before joining) is arranged on the entry side of the joining machine (between the roughing mill and the joining machine), and after the metal plate of the preceding material The end and the tip of the metal plate of the succeeding material, so-called joint surface crops, are cut off.

  Furthermore, even in the above-described hot rolling equipment having a joining machine, when performing batch processing for finish rolling for each slab, the pre-joining CS is not used, and only the pre-finishing CS is used. Yes.

  The above-mentioned pre-joining CS includes spaces for dropping the cut crop as it is on the entry side and the exit side. In such a pre-joining CS, various techniques have been developed in order to improve the plate-through property of the metal plate during batch processing. For example, Patent Document 1 describes a joining cropper having an output apron disposed on the cropping body main body output side, and Patent Document 2 discloses a moving means for moving the crop shear offline and the crop shear. A steel strip continuous hot rolling equipment line having a steel piece transporting table roller that can be moved online in accordance with the movement of the steel frame is described. Patent Document 3 discloses a roller table unit on the inlet side and the outlet side of the shear frame. A crop shear in which is arranged is described.

JP 2001-276910 A Japanese Patent No. 3319892 JP-T-2006-509638

  However, in the cropping joint described in Patent Document 1 described above, although the steel piece can be supported from below by the output apron to improve the plate-through property of the steel piece, The distance between the table roller to be arranged and the outlet apron is long, the tip of the steel piece is warped up or down, or the steel piece itself is bent, There was a possibility that scratches were imparted by contact with the lower drum.

  Moreover, in the continuous hot-rolling equipment row | line | column of the steel slab described in patent document 2 mentioned above, although the plate | board property of a steel slab can be improved with the table roller for steel slab conveyance, a crop shear and a steel slab by a moving means Since the transfer table roller is moved to switch between online and offline, this switching takes time and reduces productivity.

  In the crop shear described in Patent Document 3 described above, the roller table unit improves the sheet-passing property of the belt-shaped material, but the roller table unit is arranged in the belt-shaped material threading plate path, so the crop of the belt-shaped material is cut. In some cases, the roller table unit may prevent the cut crop from being removed from the passage plate path.

  Accordingly, the present invention has been proposed in view of the above-described problems, and while ensuring a space for removing the cut crop, the cutting performance of the metal plate is improved and the productivity is suppressed from being lowered. An object is to provide an apparatus.

The cutting device according to the first invention for solving the above-described problem is as follows.
A cutting apparatus that includes an upper drum and a lower drum, which are respectively disposed above and below the plate passage of the metal plate, and in which cutting blades are assembled, and which cuts the metal plate by rotationally driving the upper drum and the lower drum. Because
A guide roller that passes through the metal plate, and guides the metal plate between the upper drum and the lower drum. A guide mechanism to
And a moving means for moving the guide mechanism between a guide position for guiding the metal plate between the upper drum and the lower drum and a retracted position spaced apart from the guide position. To do.

The cutting device according to the second invention for solving the above-described problem is the cutting device according to the first invention,
The moving unit includes a shielding member disposed between the guide roller and the lower drum when the guide mechanism is positioned at the guide position.

A cutting device according to a third invention for solving the above-described problem is a cutting device according to the second invention,
Protrusions are provided on the outer periphery of the lower drum,
When the moving means positions the guide mechanism at the guide position, the lower drum is controlled to dispose the protrusion close to the shielding member by controlling the lower drum.

  According to the cutting device of the first invention, when the moving means positions the guide mechanism at the guide position, the table roller is disposed on the entry side and the exit side of the metal plate in the cutting device and passes the metal plate. A guide roller is disposed therebetween. Therefore, this guide roller can support the metal plate, and the distance between the table roller and the guide roller is made shorter than the distance between the table rollers arranged on the entry side and the exit side of the conventional cutting device. The metal plate in the cutting device can be prevented from entering the removal space of the cut crop provided on the entry side and the exit side of the cutting device due to the upper and lower warpage of the metal plate and the bending of the metal plate itself. Improves the threadability. Further, since the moving means positions the guide mechanism at the retracted position, a space for removing the cut crop can be secured. Further, the position of the guide mechanism can be easily adjusted by the moving means, and a reduction in productivity can be suppressed.

  According to the cutting device according to the second invention, in addition to the same operational effects as the cutting device according to the first invention, when the moving means positions the guide mechanism at the guide position, the guide roller and the lower drum By providing the shielding member disposed between them, the metal plate is prevented from entering between the guide roller and the lower drum due to the downward warping of the metal plate, and the plate passing property of the metal plate is further improved.

  According to the cutting device according to the third invention, the same effect as the cutting device according to the second invention is obtained, and a protrusion is provided on the outer periphery of the lower drum, and the moving means positions the guide mechanism at the guide position. The lower drum is controlled to dispose the metal plate between the lower drum and the guide mechanism. The plate-through property of the plate is further improved.

  Hereinafter, the best mode for carrying out the cutting device according to the present invention will be specifically described based on examples.

A cutting apparatus according to a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a schematic view of a hot rolling facility equipped with a cutting device according to a first embodiment of the present invention. FIG. 2 is a side view of the cutting device, and FIG. 3 is a plan view of a guide mechanism provided in the cutting device. In FIG. 2, the case where the guide mechanism included in the cutting device is positioned at the guide position is indicated by a solid line, and the case where the guide mechanism is positioned at the retracted position is indicated by a two-dot chain line.

  As shown in FIG. 1, a hot rolling facility equipped with a cutting device according to a first embodiment of the present invention includes a rough rolling mill (hereinafter referred to as a rough mill) 1, a coil box 2, and a joining machine as shown in FIG. 3. A finishing mill (hereinafter referred to as a finishing mill) 4 and a down coiler 5 each including a multi-stage rolling mill are provided.

  The metal plates 6 and 7 formed by rolling the slab in the coarse mill 1 are wound around the coiler of the coil box 2. The succeeding metal plate 6 unwound from the coiler of the coil box 2 is cut by the pre-joining cutting device 10 after the leading end of the succeeding metal plate 6 is cut by the pre-joining cutting device 10 as necessary. It joins with the joining machine 3 with the rear end of the preceding metal plate 7 from which the part was cut.

  The metal plate (continuous strip steel) joined by the joining machine 3 and made into a continuous state and the metal plate not joined by the joining machine 3 are sent to the finishing mill 4.

  The metal plate 7 sent to the finishing mill 4 is sequentially hot-rolled by a multi-stage rolling mill and rolled to a desired plate thickness, and the metal plate 7 rolled to a desired plate thickness is wound around the down coiler 5. . Cutting means 8 is disposed on the entry side of the down coiler 5 (exit side of the finishing mill 4), and a predetermined portion is cut by the cutting means 8 to form a product coil.

In FIG. 1, reference numeral 9 denotes a pre-finishing cutting device provided on the entrance side of the finishing mill, and the front and rear ends of the metal plate are cut by the pre-finishing cutting device 9.
In addition, arrangement | positioning of the pre-finishing cutting apparatus 9 is suitably selected and arrange | positioned with the condition of a hot rolling installation, etc., and an arrangement position, the presence or absence of arrangement | positioning, etc. are not limited to the example of illustration.

Here, the pre-joining cutting apparatus 10 will be described in detail below with reference to FIGS. 2 and 3.
As shown in FIG. 2, the pre-joining cutting device 10 is disposed above the passage plate path of the metal plates 6 and 7 in the housing 18, and the upper drum 13 on which the two cutting blades 11 a and 11 b are assembled, It has a lower drum 14 which is arranged below the plate path of the metal plates 6 and 7 and has two cutting blades 12a and 12b assembled thereto. The upper and lower drums 13 and 14 are rotationally driven to drive the metal plate 6 , 7.

  In the pre-joining cutting apparatus 10 described above, the guide rollers 42 and 52 for passing the metal plates 6 and 7 are provided, and the guide mechanisms 40 and 40 for guiding the metal plates 6 and 7 between the upper drum 13 and the lower drum 14. 50 is provided. Furthermore, in the cutting apparatus 10 before joining, the guide mechanisms 40 and 50 are separated from the guide position for guiding the metal plates 6 and 7 between the upper drum 13 and the lower drum 14, and the passage of the metal plates is performed. Moving mechanisms 60 and 70 (moving means) are provided for moving between retreat positions outside the plate path. A plurality of table rollers 19 are arranged on the entrance side and the exit side of the metal plates 6 and 7 of the pre-joining cutting apparatus 10, and the metal plates 6 and 7 are passed through this.

  The upper drum 13 is formed in a substantially elliptical shape having a major axis and a minor axis in a cross section along the rotation direction. The cutting blade 11a and the cutting blade 11b are arranged to face an arcuate circumferential surface forming the major axis of the upper drum 13. That is, the cutting blade 11 a and the cutting blade 11 b are arranged on the same plane with an arcuate peripheral surface having a major axis of the upper drum 13. When the metal plates 6 and 7 are not cut, the major axis of the upper drum 13 (the cutting blade 11a and the cutting blade 11b) is disposed at a horizontal position, and the upper drum 13 is stopped.

  On the other hand, the lower drum 14 is formed in a substantially circular shape in a cross section along the rotation direction. The cutting blade 12a and the cutting blade 12b are disposed to face the peripheral surface of the lower drum 14. That is, the cutting blade 12 a and the cutting blade 12 b are arranged on the same plane on the peripheral surface of the lower drum 14. In addition, a plurality of protrusions 14 a protruding outward are provided on the outer periphery of the lower drum 14. When the metal plates 6 and 7 are not cut, the cutting blade 12a and the cutting blade 12b are arranged at a horizontal position, and the lower drum 14 is stopped.

  The upper drum 13 and the lower drum 14 described above are rotationally driven in synchronization by a driving source (not shown).

  The guide mechanisms 40 and 50 described above are disposed on the entry side and the exit side of the metal plates 6 and 7 of the pre-joining cutting apparatus 10 as shown in FIGS. The guide mechanisms 40 and 50 arranged on the entry side and the exit side of the metal plates 6 and 7 of the pre-joining cutting apparatus 10 rotatably support the guide rollers 42 and 52, and a box-shaped attachment portion 41a opened upward. , 51a and guide mechanism bodies 41, 51 which are continuous to the mounting portions 41a, 51a and are supported by shafts 81, 82 so as to be rotatable. Gears 43 and 53 are provided at the ends of the guide rollers 42 and 52, respectively. The gears 43 and 53 are connected to a motor (not shown) via first gears 44 and 54, second gears 45 and 55, shaft couplings 46 and 56, and shafts 47 and 57, respectively. By driving this motor, the guide rollers 42 and 52 rotate, and the metal plates 6 and 7 are passed by this rotation.

  The mounting portions 41a and 51a of the guide mechanism main bodies 41 and 51 described above are located on the lower drum 14 side, are located below the plate passage of the metal plates 6 and 7, and extend along the outer periphery of the lower drum 14. Side walls 48 and 58, and shielding members 49 and 59 that shield only the upper part in the vicinity of the side walls 48 and 58. In other words, when the moving mechanisms 60 and 70 position the guide mechanisms 40 and 50 at the guide positions, the shielding members 49 and 59 disposed between the guide rollers 42 and 52 and the lower drum 14 are provided. The metal plates 6, 7 are prevented from entering between the guide rollers 42, 52 and the lower drum 14 due to the downward warping of the plates 6, 7, and the plate-through property of the metal plates 6, 7 is further improved.

  The above-described moving mechanisms 60 and 70 have cylinders 62 and 72 whose one end is rotatably fixed via shafts 61 and 71, and rods 63 and 73 that expand and contract by supply and discharge of hydraulic pressure and the like into the cylinders 62 and 72. And have. The rod end portions 63a and 73a are supported by the guide mechanism main bodies 41 and 51 via shaft bodies 64 and 74, respectively.

  In the pre-joining cutting apparatus 10 described above, when the moving mechanisms 60 and 70 position the guide mechanisms 40 and 50 at the guide positions, the lower drum 14 is controlled so that the protrusion 14a of the lower drum 14 is moved to the guide mechanisms 40 and 50. A lower drum control device (lower drum control means) (not shown) disposed near the shielding members 49 and 59 is provided.

  That is, in the cutting apparatus 10 before joining described above, when the guide mechanisms 40 and 50 are not used, such as when processing a continuous steel strip obtained by joining a plurality of metal plates, the hydraulic pressure is supplied to and discharged from the cylinders 62 and 72. As a result, the rods 63 and 73 contract, and the guide mechanisms 40 and 50 are pivoted and lifted with the shafts 64 and 74 as fulcrums, and are disposed at the retracted position outside the plate passage of the metal plates 6 and 7. Is done. On the other hand, when the guide mechanisms 40 and 50 are used, such as when processing a single metal plate, the rods 63 and 73 are extended by the supply and discharge of the hydraulic pressure to and from the cylinders 62 and 72. The guide mechanisms 40 and 50 are pivoted and lowered with 74 as a fulcrum, and are arranged at the guide position. Therefore, when the guide mechanisms 40 and 50 are positioned at the guide position, the guide rollers 42 and 52 are disposed in the plate passage of the metal plates 6 and 7, and these guide rollers 42 and 52 support the metal plates 6 and 7. Therefore, the distance between the table roller 19 and the guide rollers 42 and 52 is shorter than the distance between the table rollers arranged on the entry side and the exit side of the conventional cutting apparatus, Intrusion into the removal space of the cut crops provided on the entry side and the exit side of the pre-joining cutting device 10 due to warpage and downward warping and bending of the metal plates 6 and 7 itself can be suppressed. The plate-through property of the metal plates 6 and 7 is improved. Further, since the shielding members 49 and 59 are disposed in the vicinity of the protruding portion 14a of the lower drum 14, the metal plates 6 and 7 are prevented from entering between the lower drum 14 and the guide mechanisms 40 and 50, so that the metal The plateability of the plates 6 and 7 is further improved.

  Therefore, according to the cutting device 10 according to the first embodiment of the present invention, when the moving mechanisms 60 and 70 position the guide mechanisms 40 and 50 at the guide position, the metal plates 6 and 7 in the pre-joining cutting device 10 are used. Guide rollers 42 and 52 are disposed between the table rollers 19 that are disposed on the entry side and the exit side of the metal plate 6 and pass through the metal plates 6 and 7. Therefore, the guide rollers 42 and 52 can support the metal plates 6 and 7, and the distance between the table roller 19 and the guide rollers 42 and 52 is the table roller disposed on the entry side and the exit side of the conventional cutting device. Can be made shorter than the distance between them, the upper and lower warpage of the metal plates 6 and 7 and the bending of the metal plates 6 and 7 themselves are provided on the entry side and the exit side of the cutting apparatus 10 before joining. The entry of the crop into the removal space can be suppressed, and the plate passing properties of the metal plates 6 and 7 in the pre-joining cutting device 10 are improved. Further, since the moving mechanisms 60 and 70 position the guide mechanisms 40 and 50 at the retracted position, a space for removing the cut crops can be secured. Moreover, the position adjustment of the guide mechanisms 40 and 50 by the moving mechanisms 60 and 70 is easy, and a decrease in productivity can be suppressed.

  In the above description, the pre-joining cutting apparatus 10 provided with the guide mechanisms 40 and 50 on both the entry side and the exit side of the metal plates 6 and 7 has been described. It is also possible to provide a pre-joining cutting device provided only on one of the entry side and the exit side. Even such a pre-joining cutting device has the same effects as the pre-joining cutting device 10 described above.

  In the above description, the pre-joining cutting device 10 including the moving mechanisms 60 and 70 that move from the guide position to the retracted position by contracting and rotating upward has been described. In addition, it is possible to provide a pre-joining cutting device having a moving mechanism that moves downward to the retracted position by rotating downward by contraction or extension. Even such a pre-joining cutting device has the same effects as the pre-joining cutting device 10 described above.

  The present invention can be used in a cutting device.

It is the schematic of the hot rolling equipment which comprises the cutting device concerning the 1st example of the present invention. It is a side view of the cutting device concerning the 1st example of the present invention. It is a top view of the guide mechanism which the cutting device concerning the 1st example of the present invention comprises.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coarse rolling mill 2 Coil box 3 Joiner 4 Finish rolling mill 5 Down coiler 6 Metal plate (following metal plate)
7 Predecessor Metal Plate 9 Pre-finish Cutting Device 10 Pre-Join Cutting Device 11, 12 Cutting Blade 13 Upper Drum 14 Lower Drum 18 Housing 40, 50 Guide Mechanism 42, 52 Guide Roller 60, 70 Moving Mechanism

Claims (3)

A cutting apparatus that includes an upper drum and a lower drum, which are respectively disposed above and below the plate passage of the metal plate, and in which cutting blades are assembled, and which cuts the metal plate by rotationally driving the upper drum and the lower drum. Because
A guide roller that passes through the metal plate, and guides the metal plate between the upper drum and the lower drum. A guide mechanism to
And a moving means for moving the guide mechanism between a guide position for guiding the metal plate between the upper drum and the lower drum and a retracted position spaced apart from the guide position. Cutting device to do. The cutting device according to claim 1,
A cutting apparatus comprising: a shielding member disposed between the guide roller and the lower drum when the moving means positions the guide mechanism at the guide position. The cutting device according to claim 2,
Protrusions are provided on the outer periphery of the lower drum,
Cutting comprising: a lower drum control means for controlling the lower drum when the moving means positions the guide mechanism at the guide position to dispose the protrusion close to the shielding member. apparatus.

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